//
// Created by qiang on 2020/3/27.
//

#ifndef STDAYCPP_CIRCLECLASS_H
#define STDAYCPP_CIRCLECLASS_H

#include <iostream>

void testClass();

class CircleClass {

private:
    double r;//半径
public:
    CircleClass();//构造函数
    CircleClass(double R);//带参数构造函数
    double area();//求面积函数

};


#endif //STDAYCPP_CIRCLECLASS_H
